package com.pandas.community.controller;

import com.google.code.kaptcha.Producer;
import com.pandas.community.Utils.CommunityConstant;

import com.pandas.community.Utils.CommunityUtil;
import com.pandas.community.Utils.RedisKeyUtil;
import com.pandas.community.entity.User;
import com.pandas.community.service.UserService;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;


import org.springframework.beans.factory.annotation.Value;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.CookieValue;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import javax.imageio.ImageIO;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Map;
import java.util.concurrent.TimeUnit;

@Controller
public class LoginController implements CommunityConstant {
    private static final Logger logger = LoggerFactory.getLogger(LoginController.class);


    @Autowired
    private UserService userService;

    @Autowired
    private Producer kaptchaProducer;

    @Autowired
    private RedisTemplate redisTemplate;

    //跳转注册页面
    @RequestMapping(value="/register", method = RequestMethod.GET)
    public String getRegisterPage(){
        return "/site/register";
    }

    //跳转登录页面
    @RequestMapping(value="/login", method = RequestMethod.GET)
    public String getLoginPage(){
        return "site/login";
    }

    @RequestMapping(value="/forget", method = RequestMethod.GET)
    public String getForgetPage(){
        return "/site/forget";
    }

    @Value("${server.servlet.context-path}")
    private String contextPath;

    //注册页面处理
    @RequestMapping(value="/register", method = RequestMethod.POST)
    public String register(Model model, User user){
        Map<String, Object> map = userService.register(user);

        //注册成功返回空
        if(map == null || map.isEmpty()){
            model.addAttribute("msg","注册成功，我们已向您发送一封激活邮件！");
            model.addAttribute("reDirection","/index");
            return "/site/operate-result";
        }else{
            //注册不成功
            model.addAttribute("usernameMsg",map.get("usernameMsg"));
            model.addAttribute("passwordMsg",map.get("passwordMsg"));
            model.addAttribute("emailMsg",map.get("emailMsg"));
            return "/site/register";
        }
    }

    //激活页面处理
    @RequestMapping(path="/activation/{userId}/{code}", method = RequestMethod.GET)
    public String activation(Model model, @PathVariable("userId") int userId, @PathVariable("code") String code){
        int result = userService.activation(userId, code);
        if(result == ACTIVATION_SUCCESS){
            model.addAttribute("msg", "激活成功!");
            model.addAttribute("reDirection","/login");
        }else if(result == ACTIVATION_REPEAT){
            model.addAttribute("msg","该账号已经激活过了！");
            model.addAttribute("reDirection","/login");
        }else{
            model.addAttribute("msg","激活失败，激活码不正确!");
            model.addAttribute("reDirection","/index");
        }

        return "/site/operate-result";
    }


    @RequestMapping(value = "/kaptcha", method = RequestMethod.GET)
    public void getKaptcha(HttpServletResponse response/*, HttpSession session*/){
        //生成验证码
        String text = kaptchaProducer.createText();
        BufferedImage image = kaptchaProducer.createImage(text);

//        //验证码存入session
//        session.setAttribute("kaptcha", text);

        String kaptchaOwner = CommunityUtil.generateUUID();
        Cookie cookie = new Cookie("kaptchaOwner", kaptchaOwner);
        // 60s
        cookie.setMaxAge(60);
        // 生效范围
        cookie.setPath(contextPath);
        response.addCookie(cookie);

        String kaptchaKey = RedisKeyUtil.getKaptchaKey(kaptchaOwner);
        //保存60s
        redisTemplate.opsForValue().set(kaptchaKey, text, 60, TimeUnit.SECONDS);


        //将图片输出给浏览器
        response.setContentType("image/png");

        try {
            OutputStream os = response.getOutputStream();
            ImageIO.write(image, "png", os);
        } catch (IOException e) {
            logger.error("加载验证码出错：" + e.getMessage());
        }
    }

    //登录交互
    @RequestMapping(value="/login", method = RequestMethod.POST)
    public String login(String username, String password, String code, boolean rememberme,
                      Model model, /*HttpSession session,*/ HttpServletResponse response,
                        @CookieValue("kaptchaOwner") String kaptchaOwner){

//        String kaptcha = (String) session.getAttribute("kaptcha");

        //从cookie中取出
        String kaptcha = null;
        if(StringUtils.isNotBlank(kaptchaOwner)){
            String kaptchaKey = RedisKeyUtil.getKaptchaKey(kaptchaOwner);
            kaptcha = (String) redisTemplate.opsForValue().get(kaptchaKey);
        }


        if(StringUtils.isBlank(kaptcha) || StringUtils.isBlank(code) || !kaptcha.equalsIgnoreCase(code)){
            model.addAttribute("codeMsg","验证码不正确！");
            return "/site/login";
        }

        //检查登录密码
        int expiredSeconds = rememberme ? REMEMBER_EXPIRED_SECONDS : DEFAULT_EXPIRED_SECONDS;
        Map<String, Object> map = userService.login(username, password, expiredSeconds);
        if(map.containsKey("ticket")){
            Cookie cookie = new Cookie("ticket", map.get("ticket").toString());

            //设置生效路径
            cookie.setPath(contextPath);
            //设置存活时间
            cookie.setMaxAge(expiredSeconds);
            //向客户端发送
            response.addCookie(cookie);
            return "redirect:/index";
        }else{
            model.addAttribute("passwordMsg", map.get("passwordMsg"));
            model.addAttribute("usernameMsg",map.get("usernameMsg"));
            return "/site/login";
        }
    }

    @RequestMapping(value = "/logout", method = RequestMethod.GET)
    public String logout(@CookieValue("ticket") String ticket){
        userService.logout(ticket);
        return "redirect:/login";
    }


}
